Aerobic denitrification of oligotrophic source water driven by reduced metal manganese

Aerobic denitrification with an electrode as the sole electron and energy source

“…59 Accordingly, it was shown recently that manganese, a highly reduced electron donor, may serve as a complementary electron donor to organic sources, to increase the denitrification rate under aerobic conditions. 18 In this context, it can be speculated that in the case of bacteria growing with a cathode as an electron donor, the reduction of nitrate may serve to alleviate the strongly reducing environment in the electron transport chain, generated by the negative potential applied to the electrode that serves as an inexhaustible donor of low potential electrons.…”

“…16,17 Recently, manganese was shown to enhance denitrification as a complementary electron source to organic substrates. 18 However, aerobic denitrification under pure litho-autotrophic conditions has not been found yet, possibly because inorganic electron donors are not sufficiently reduced to allow this process.…”